:root {
    --size: 140px; /* 한 칸 크기 */
}

.puzzle-game-wrap {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
    max-width: 730px;
    margin: 0 auto 40px;
    padding: 20px;
    background-color: #f5f5f5;
    font-family: sans-serif;
    box-sizing: border-box;
}

.puzzle-game-wrap * { box-sizing: border-box; }

.puzzle-game-wrap h1 { margin: 20px 0 0; font-size: 32px; text-align: center; }
.puzzle-game-wrap p { margin: 15px 0; font-size: 18px; line-height: 1.4; color: #555; }

.puzzle-game-wrap .game-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 30px;
    width: 100%;
}

/* 4x2 그리드 */
.puzzle-game-wrap .board, 
.puzzle-game-wrap .pieces-area {
    display: grid;
    grid-template-columns: repeat(4, var(--size));
    grid-template-rows: repeat(2, var(--size));
}

.puzzle-game-wrap .board {
    display: grid;
    grid-template-columns: repeat(4, var(--size));
    grid-template-rows: repeat(2, var(--size));
    border: 2px solid #333; /* 전체 바깥 테두리 */
    background: #fff;
}

.puzzle-game-wrap .pieces-area {
    gap: 10px;
    padding: 15px;
    background: #e9ecef;
    border-radius: 12px;
}

.puzzle-game-wrap .slot, 
.puzzle-game-wrap .piece-holder {
    width: var(--size);
    height: var(--size);
    border: 0.5px solid #ddd;
    box-sizing: border-box;
}

.puzzle-game-wrap .tile {
    width: var(--size);
    height: var(--size);
    background-image: url('/webzine/202604/img/sub/sub_3_2_img2.jpg');
    background-repeat: no-repeat;
    background-position: 0 0;
    background-size: calc(var(--size) * 4) calc(var(--size) * 2);
    cursor: grab;
    touch-action: none;
    user-select: none;
    -webkit-user-select: none;

    /* 선명도 보정 */
    image-rendering: -webkit-optimize-contrast;
    image-rendering: crisp-edges;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    transform: translateZ(0);
    -webkit-transform: translateZ(0);
}

.puzzle-game-wrap .tile.dragging {
    position: fixed !important;
    z-index: 10000 !important;
    pointer-events: none;
    opacity: 0.96;
    box-shadow: 5px 5px 15px rgba(0,0,0,0.3);
    will-change: transform, left, top;
}

.puzzle-game-wrap .tile.fixed {
    cursor: default;
    border: none;
}

.puzzle-game-wrap #main-restart {
    margin-top: 30px;
    padding: 10px 25px;
    background: #333;
    color: #fff;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

/* 완성 모달창 */
.puzzle-game-wrap #win-modal {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 99999;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.7);
}

.puzzle-game-wrap .modal-content {
    position: relative;
    width: 90%;
    max-width: 320px;
    padding: 30px;
    background: #fff;
    border-radius: 15px;
    text-align: center;
}

.puzzle-game-wrap .modal-close {
    position: absolute;
    top: 10px;
    right: 10px;
    width: 32px;
    height: 32px;
    padding: 0;
    border: none;
    border-radius: 50%;
    background: #fff;
    color: #000;
    font-size: 22px;
    line-height: 1;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 2px 6px rgba(0,0,0,0.2);
}

.puzzle-game-wrap .modal-close:hover {
    background: #f1f1f1;
}

.puzzle-game-wrap .btn-group {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-top: 20px;
    align-items: center;
}

.puzzle-game-wrap .modal-btn {
    width: 100%;
    max-width: 220px;
    padding: 12px;
    border-radius: 8px;
    font-weight: bold;
    text-decoration: none;
    display: inline-block;
    text-align: center;
}

.puzzle-game-wrap .go-link {
    background: #2ecc71;
    color: #fff;
}

.puzzle-game-wrap .restart {
    background: #34495e;
    color: #fff;
    border: none;
    cursor: pointer;
}

@media (max-width: 600px) {
    :root { --size: 75px; }

    .puzzle-game-wrap h1 { font-size: 24px; }
    .puzzle-game-wrap p { font-size: 15px; }

    .puzzle-game-wrap .modal-content {
        padding: 26px 20px 20px;
    }

    .puzzle-game-wrap .modal-close {
        top: 8px;
        right: 8px;
        width: 30px;
        height: 30px;
        font-size: 20px;
    }
}